I have a LaCie D2 triple-interface external drive that I use with my MBP and Time Machine, connecting via FireWire 800. Suddenly tonight the drive wouldn't boot. However, it DOES boot using the FireWire 400 cable and the USB cable. The FireWire 800 cable does power the drive from the MBP. What's likelier -- I need a new cable, the port on my MBP is bad, or it's something in the internals of the external drive itself? Thanks.